Patents by Inventor Ralf Schäfer

Ralf Schäfer has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11975332
    Abstract: An impact reactor for comminuting composite materials having a rotor with impact elements is arranged in a cylindrical casing. An end face of the impact reactor, remote from the rotor, is closed by a cover. A suction opening is assigned to the cover and a classifying device is assigned to the suction opening. Such an impact reactor may be used to process, by way of example, accumulator batteries, mineral wool and raw material.
    Type: Grant
    Filed: February 3, 2022
    Date of Patent: May 7, 2024
    Assignee: SCHÄFER ELEKTROTECHNIK U. SONDERMASCHINEN GMBH
    Inventor: Ralf Schäfer
  • Publication number: 20240082851
    Abstract: An impact reactor for comminuting material to be comminuted, comprising a cylindrical casing, a bottom, wherein the casing, the bottom and the cover enclose an impact reactor chamber, wherein a rotor is arranged in the impact reactor chamber, wherein the rotor is provided with impact elements, wherein at least one feed opening is provided for feeding material to be comminuted into the impact reactor chamber, and wherein at least one removal opening is provided for removing comminuted material and/or gaseous comminuted products from the impact reactor chamber, wherein the feed opening and/or the removal opening are closable.
    Type: Application
    Filed: February 16, 2022
    Publication date: March 14, 2024
    Inventor: Ralf SCHÄFER
  • Patent number: 11624440
    Abstract: The disclosure concerns a seal, in particular a rod seal for sealing an axially movable rod in a guide cylinder, in particular a piston seal for a pneumatically, electrically or hydraulically driven coating agent pump for pumping coating agent, having an annular sealing element for sealingly resting on a circumferential surface of an axially movable rod, and having at least one elastic annular pretensioning element, the annular pretensioning element surrounding the annular sealing element radially on the outside and pretensioning it radially to the inside. The disclosure provides an annular seal base body which externally surrounds and holds the sealing element and the pretensioning element. In addition, the disclosure also comprises an inverted variant in which the seal is arranged in an annular groove in a lateral surface of a piston and lies sealingly against the cylinder running surface.
    Type: Grant
    Filed: January 8, 2019
    Date of Patent: April 11, 2023
    Assignee: Dürr Systems AG
    Inventors: Herbert Martin, Martin Stiegler, Hannes Mayer, Ralf Schäfer
  • Publication number: 20220152618
    Abstract: Impact reactor (1) for comminuting composite materials, comprising a cylindrical casing (2), in which a rotor (4) provided with impact elements (5) is 5 arranged, wherein the impact reactor (1) is closed on the end face remote from the rotor (4) by means of a cover (7), wherein an suction opening (8) is assigned to the cover (7), wherein a classifying device (9) is assigned to the suction opening (8), and method of processing accumulator batteries, mineral wool and raw material.
    Type: Application
    Filed: February 3, 2022
    Publication date: May 19, 2022
    Inventor: Ralf SCHÄFER
  • Publication number: 20200393045
    Abstract: The disclosure concerns a seal, in particular a rod seal for sealing an axially movable rod in a guide cylinder, in particular a piston seal for a pneumatically, electrically or hydraulically driven coating agent pump for pumping coating agent, having an annular sealing element for sealingly resting on a circumferential surface of an axially movable rod, and having at least one elastic annular pretensioning element, the annular pretensioning element surrounding the annular sealing element radially on the outside and pretensioning it radially to the inside. The disclosure provides an annular seal base body which externally surrounds and holds the sealing element and the pretensioning element. In addition, the disclosure also comprises an inverted variant in which the seal is arranged in an annular groove in a lateral surface of a piston and lies sealingly against the cylinder running surface.
    Type: Application
    Filed: January 8, 2019
    Publication date: December 17, 2020
    Inventors: Herbert Martin, Martin Stiegler, Hannes Mayer, Ralf Schäfer
  • Patent number: 10697443
    Abstract: An exhaust air conduit for a pneumatically powered pump, in particular, from a coating agent pump in a painting plant, is provided. The conduit includes an inlet for receiving the exhaust air from the pump, an outlet for discharging the exhaust air, and an exhaust air channel in which the exhaust air flows from the inlet to the outlet of the exhaust air conduit, and a housing member in which the exhaust air channel extends. A first thermal insulation element is provided in the region of a direction change of the exhaust air channel, in order to prevent an accumulation of the exhaust air directly at the inner wall of the exhaust air channel and thereby to lessen the cooling of the housing member.
    Type: Grant
    Filed: May 4, 2015
    Date of Patent: June 30, 2020
    Assignee: Dürr Systems AG
    Inventors: Kevin Preuss, Roland Gerlach, Ralf Schäfer
  • Publication number: 20200094443
    Abstract: The invention relates to a method for recycling fiber composite materials, in which items containing fiber composite material are fed into an impact reactor and comminuted by mechanical loading, wherein the comminution is carried out in such a way that fiber needles with adhering matrix are produced as the comminution product.
    Type: Application
    Filed: May 11, 2018
    Publication date: March 26, 2020
    Applicants: Schäfer Elektrotechnik u. Sondermaschinen GmbH, Carbon-Werke Weißgerber GmbH & Co. KG
    Inventors: Ralf Schäfer, Franz Weißgerber
  • Publication number: 20190262840
    Abstract: Impact reactor (1) for comminuting composite materials, comprising a cylindrical casing (2), in which a rotor (3) is arranged, and an introducing opening (9) for introducing the composite materials and an extraction opening (8) for discharging the comminuted composite materials, wherein at least one further introducing opening (10) for a cooling medium is provided.
    Type: Application
    Filed: October 26, 2017
    Publication date: August 29, 2019
    Inventor: Ralf SCHÄFER
  • Publication number: 20190176160
    Abstract: Impact reactor (1) for comminuting composite materials, comprising a cylindrical casing (2), in which a rotor (4) provided with impact elements (5) is arranged, wherein the impact reactor (1) is closed on the end face remote from the rotor (4) by means of a cover (7), wherein an suction opening (8) is assigned to the cover (7), wherein a classifying device (9) is assigned to the suction opening (8), and method of processing accumulator batteries, mineral wool and raw material.
    Type: Application
    Filed: August 23, 2017
    Publication date: June 13, 2019
    Inventor: Ralf SCHÄFER
  • Patent number: 9956577
    Abstract: The disclosure relates to a paint system for coating components with a coating medium, in particular a painting system for painting motor vehicle bodywork components with a paint, comprising at least one pneumatic pump for circulating paint in the system. The pneumatic pump includes a feed air connection for feeding in a feed air stream for mechanically powering the pump and an exhaust air connection for conducting away a depressurised, cold exhaust air stream. The cold exhaust stream passing through a first heat exchanger where the heat exchanger cools a medium in a cooling circuit and the medium cools a heat-sensitive component. The heat sensitive component can be the paint circulation lines or a protective housing for the robot.
    Type: Grant
    Filed: April 7, 2014
    Date of Patent: May 1, 2018
    Assignee: Dürr Systems GmbH
    Inventors: Bjorn Schenke, Ralf Schafer, Armin Hoderlein
  • Publication number: 20170152841
    Abstract: An exhaust air conduit for a pneumatically powered pump, in particular, from a coating agent pump in a painting plant, is provided. The conduit includes an inlet for receiving the exhaust air from the pump, an outlet for discharging the exhaust air, and an exhaust air channel in which the exhaust air flows from the inlet to the outlet of the exhaust air conduit, and a housing member in which the exhaust air channel extends. A first thermal insulation element is provided in the region of a direction change of the exhaust air channel, in order to prevent an accumulation of the exhaust air directly at the inner wall of the exhaust air channel and thereby to lessen the cooling of the housing member.
    Type: Application
    Filed: May 4, 2015
    Publication date: June 1, 2017
    Inventors: Kevin Preuss, Roland Gerlach, Ralf Schäfer
  • Patent number: 9662673
    Abstract: A coating agent pump for conveying a coating agent, in particular a paint, an adhesive or a sealing agent. The coating agent pump comprises a pump inlet for admitting the coating agent to be conveyed and a pump outlet for delivering the coating agent conveyed by the coating agent pump. In addition to the pump inlet and the pump outlet, a cleaning opening is provided for cleaning the coating agent pump of the coating agent situated in the coating agent pump.
    Type: Grant
    Filed: February 5, 2014
    Date of Patent: May 30, 2017
    Assignee: Durr Systems GmbH
    Inventors: Bjorn Schenke, Roland Gerlach, Ralf Schafer
  • Patent number: 9452451
    Abstract: The invention relates to a cleaning device (1) for an atomizer (2) having a specified outer contour, in particular for cleaning a rotary atomizer (2), comprising at least one cleaning brush (5) for cleaning the atomizer (2), wherein the cleaning brush (5) has a specified brush contour. According to the invention, the brush contour of the cleaning brush (5) is adapted to the outer contour of the atomizer (2) so that the cleaning brush (5) nestles up against the atomizer (2). The invention further relates to a corresponding cleaning brush (5) and to a suitable cleaning method.
    Type: Grant
    Filed: November 2, 2011
    Date of Patent: September 27, 2016
    Assignee: Durr Systems GmbH
    Inventors: Marcus Kleiner, Michael Baumann, Thomas Buck, Ralf Schäfer, Georg M. Sommer, Martin Wurst, Frank Herre
  • Publication number: 20160067731
    Abstract: The invention relates to a coating system for coating components with a coating medium, in particular a painting system for painting motor vehicle bodywork components with a paint, comprising at least one pneumatic pump with a feed air connection for feeding in a feed air stream for mechanically powering the pump and comprising an exhaust air connection for conducting away a depressurised, cold exhaust air stream and with a heating-sensitive component of the coating system. The coating system according to the invention also comprises a cooling device for cooling the heating-sensitive component of the coating system by means of the exhaust air stream of the pump.
    Type: Application
    Filed: April 7, 2014
    Publication date: March 10, 2016
    Inventors: Bjorn Schenke, Ralf Schafer, Armin Hoderlein
  • Publication number: 20150375249
    Abstract: A coating agent pump for conveying a coating agent, in particular a paint, an adhesive or a sealing agent. The coating agent pump comprises a pump inlet for admitting the coating agent to be conveyed and a pump outlet for delivering the coating agent conveyed by the coating agent pump. In addition to the pump inlet and the pump outlet, a cleaning opening is provided for cleaning the coating agent pump of the coating agent situated in the coating agent pump.
    Type: Application
    Filed: February 5, 2014
    Publication date: December 31, 2015
    Inventors: Bjorn Schenke, Roland Gerlach, Ralf Schafer
  • Publication number: 20140075695
    Abstract: The invention relates to a cleaning device (1) for an atomizer (2) having a specified outer contour, in particular for cleaning a rotary atomizer (2), comprising at least one cleaning brush (5) for cleaning the atomizer (2), wherein the cleaning brush (5) has a specified brush contour. According to the invention, the brush contour of the cleaning brush (5) is adapted to the outer contour of the atomizer (2) so that the cleaning brush (5) nestles up against the atomizer (2). The invention further relates to a corresponding cleaning brush (5) and to a suitable cleaning method.
    Type: Application
    Filed: November 2, 2011
    Publication date: March 20, 2014
    Applicant: DURR SYSTEMS GMBH
    Inventors: Marcus Kleiner, Michael Baumann, Thomas Buck, Ralf Schäfer, Georg M. Sommer, Martin Wurst, Frank Herre
  • Publication number: 20130199424
    Abstract: A device and method for producing a fine-grained fuel, in particular from solid, paste-like or aqueous energy feed stocks, by drying and crushing, including an impact reactor having a rotor and impact elements, a labyrinth seal in the region of the rotor shaft of the impact reactor, a device for feeding hot drying gas through the labyrinth seal into the impact reactor and at least one further feed device for hot drying gas in the bottom region of the impact reactor, a feed device for solid or paste-like energy feed stocks in the top region of the impact reactor, at least one extractor device for a gas flow containing crushed and dried energy feedstock particles, and a device for separating and extracting crushed and dried energy feed stock particles from the gas flow extracted from the impact reactor.
    Type: Application
    Filed: January 26, 2011
    Publication date: August 8, 2013
    Applicants: PROACTOR SCHUTZRECHTSVERWALTUNGS GMBH, THYSSENKRUPP UHDE GMBH
    Inventors: Ralf Abraham, Stefan Hamel, Ralf Schäfer
  • Publication number: 20120312120
    Abstract: The disclosure relates to a venting assembly for a unit with components running in a lubricant. The venting assembly comprises a housing part, a rotating component which, by a rolling contact bearing, is rotatably supported around an axis of rotation relative to the housing part, as well as a venting channel for venting the assembly, wherein an inner opening of the venting channel is arranged so as to axially adjoin the rolling contact bearing, and wherein, in an axial view, the opening of the venting channel at least partially covers the rolling contact bearing. Furthermore, the disclosure relates to a transmission assembly with such a venting assembly.
    Type: Application
    Filed: November 23, 2009
    Publication date: December 13, 2012
    Applicant: GKN DRIVELINE INTERNATIONAL GMBH
    Inventors: Michael Engelmann, Ralf Schäfer, Kurt Müller
  • Patent number: 7818072
    Abstract: A press control system includes at least one sensor for registering current states of at least one component of a press and at least one regulating and control device for generating actuating signals for actuating the at least one component of the press. A press simulator is integrated into the press control system for training purposes and/or diagnostic purposes on the press.
    Type: Grant
    Filed: August 16, 2005
    Date of Patent: October 19, 2010
    Assignee: MAN Roland Druckmaschinen AG
    Inventors: Dieter Betzmeier, Ralf Schäfer
  • Publication number: 20080128212
    Abstract: The invention relates to an oil scoop assembly (2) for using in a stationary housing with machine parts, rotatable therein around a rotational axis. The oil scoop assembly comprises an oil return element (3), which can be connected to the housing and has a wiper (10) for abutting an outer face (21) of a machine part, at least one channel (6), which is supplied by the wiper (10) with oil and which ends in an annular channel (7), extending coaxially to the rotational axis A; and an oil scoop wheel (4), connectable to one of the machine parts, with a plurality of blades (24), distributed around the rotational axis A and which extend into the annular channel (7) and, when the oil scoop wheel (4) rotates relative to the oil return element (3), delivers oil from the annular channel (7). The invention relates further to a clutch arrangement (32) with such an oil scoop assembly (2).
    Type: Application
    Filed: November 27, 2007
    Publication date: June 5, 2008
    Inventors: Richard Utzat, Ralf Schafer, Antonio Correia, Aleksej Katsnelson, Holger Seidl